Valve-pin tool



Dec. 25, 1923..

K. DAI-IM VALVE PIN Toor.

Filed Feb. 9, 1925 @MUM @Ziff/@mgm Patented Dec. 25, i923.

KURT DAHM, OF MILWAUKEE, WISCONSIN.

VALVE-PIN rIOOL.

Application filed February 9, 1923.

To a-ZZ w hom t may concern Be it known that I, KURT DAHM, a citizen of the United States, and resident of Milwaukee, inthe county of Milwaukee and State of Wisconsin, have invented certain new and useful Improvements in Valve-Pin Tools; and I do hereby declare that the following is a full, clear, and exact description thereof.

This invention pertains to a tool for inserting pins into valve stems or similar' parts, where the pin openings are inaccessible to the extent of rendering insertion by hand impossible or very diiiicult.

The primary object of the invention is therefore to provide a simple, inexpensive and efficient tool, of compact and elongated structure, to facilitate insertion of pins in inaccessible parts.

A further object is to provide an elongated tool adapted to receive a pin and provided with means for ejecting the same from the tool.

A more specific object is to provide a device of the above character with means for centering the pin With relation to the stem.

A still further object resides in the provision 0f means for properly aligning the tool with relation to the stem.

I/Vith the above and other objects in view, which will appear as the description proceeds, the invention resides in the novel construction, combination and arrangement of parts, substantially as hereinafter described and more particularly defined by the appended claims, it being understood that such changes in the precise embodiment of the herein disclosed invention may be made as come within the scope of the claims.

In the accompanying drawings is illustrated one complete example of the physical embodiment of the 'present invention, constructed according to the best mode so far devised for the practical application of the principles thereof.

In the drawings:

Figure 1 illustrates an elevational view of one form of the invention with parts broken away and in section to more clearly illustrate the structural details. Y

Figure 2 isa detail sectional view, taken on the line 2 2 of Figure l, and

Figure 3, is a similar view illustrating a modified form of the invention.

Referring now more particularly to the accompanying drawings, the present inven- Serial No. 617,970.

tion is illustrated in one of its applications in connection with the insertion of valvestern pins, in which the numeral` l designates a valve provided with the conventional stem 2 and mounted in the valve housing 3. The numeral 4 designates an obstruction such as the intake or exhaust manifold which, due to its position with relation to the valve stem, renders the latter inaccessible.

The present invention which is designed to overcome the difficulty of inserting the pin 5 in the opening 6 of the valve stem, comprises an elongated sleeve 7 havinl one end slotted at 8. Mounted within thes eeve 7, is a plunger 9 provided with an offset extension 9', which projects through the slot 8 and in the retracted position of the plunger, abuts the end of the slot and serves as a stop for the plunger. The opposite end of the plunger 9 extends past the end of the sleeve 7 and has secured thereto in any suitable manner, a cap or ferrule 10 which telescopes over the sleeve. Disposed between the ferrule and the end of the sleeve 7 is a spring 11 which normally urges the operative end of the plunger to its retracted position. Secured on the sleeve 7 in any suitable manner is a collar l2 provided with finger-grips 13 which enable the tool to be gripped by the first and second fingers, leaving the thumb free to project the plunger for the purpose hereinafter described.

In the operation of the device, which is comparatively simple, the pin 5 is inserted into the end of the sleeve 7 until it abuts the end of the plunger 9, in which position the pin pro-jects slightly from the end of the tool, permitting the same to be inserted into the opening 6. The plungers then depress against the spring l1 by means of the thumb, thus ejecting the pin until the offset extension 9 engages the valve stem 2, upon which occurrence the pin is centrally positioned with relation to the valve stem.

In some instances, where the pin is to be inserted in a small stem or part, some difficulty may be encountered in properly aligninfg the tool with relation to the stem. Consequently in the modified form illustrated in Figure 3, a pair of lateral ears 14: are provided which engage the sides of the Valve stem and overcome the foregoing objections.

From the foregiong, it will be seen that a very simple and inexpensive tool has been provided, which can be readily inserted in places inaccessible to the hands and consel. A tool of the character described corn# prising a hollow sleeve adapted to receive a pin in one end, a plunger for ejecting the pin, and means carried by the plunger for centering the pin with relation 'to a valve stein. p

2. A tool of the character described coinprising a hollow sleeve provided with a slot at one end and adapted to receive a pin in said end, a plunger slidable in said sleeve, an offset projection extending through the slot, and a spring for holding the plunger in retracted position.

8. A tool of the character described comprising a hollow sleeve adapted toreceive a pin in one end,V means carried by thefsleeve for aligning the same'with a valve stein, a plunger slidable in said sleeve for ejecting the pin7 Yand means carried by the plunger` for centrally positioning the pin Withrela#V tion to the valve stern.

4. A tool of the character described coinprising a hollow sleeve adaptedto receive a pin in one end,V aplunger slidable Within the sleeve for ejecting the pin, and :means car-V ried by the sleeve for aligning the saine with the valve stem. v

` In testimony that I claim have hereunto set in v hand at -Milwauk'ed in the county of Milwaukee and State oi Wisconsin.

VKURT DAI-IM.

the foregoing I 

